Overview
The ZF 4657.354.061 Input Gear is a critical component engineered specifically for the WG 171 series transmission. This genuine OEM part serves as the primary torque input interface, transferring rotational force from the engine directly into the transmission’s planetary gearset. Positioned at the front of the main shaft assembly, the input gear engages with the clutch pack and the TRANSMISSION HOUSING to ensure smooth power delivery. Precision-machined to ZF’s exacting tolerances, the SKU 4657.354.061 is essential for maintaining proper gear mesh alignment and preventing premature wear in heavy-duty industrial applications.
Symptoms of Failure
- Grinding or whining noise during acceleration: A worn input gear produces distinct metallic sounds, especially when shifting from neutral to drive, indicating damaged tooth profiles.
- Intermittent gear slipping under load: As the gear’s splines wear, torque transmission becomes inconsistent, causing the transmission to momentarily lose power during heavy hauling.
- Metal particles in transmission fluid: Flaking or pitting on the input gear’s surface introduces ferrous debris into the oil, often visible during routine fluid changes.
- Hard shifting or delayed engagement: A degraded input gear disrupts the synchronization between the HOUS.FRONT SECT and the main shaft, leading to sluggish gear engagement.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.354.061 |
| Material | Case-hardened alloy steel (20MnCr5) |
| Number of Teeth | 23 |
| Outer Diameter | 118.5 mm |
| Inner Spline Diameter | 45.0 mm |
| Overall Length | 82.3 mm |
| Weight | 1.85 kg |
| OEM Reference | ZF 4657.354.061 |
| Heat Treatment | Carburized & tempered to HRC 58-62 |
Compatibility
This input gear is primarily designed for the ZF WG 171 series transmission, but it also fits select models in the WG 180 and WG 200 families when used with the appropriate SCREEN SHEET and TUBE assemblies. It is compatible with all WG 171 variants (A, B, C) produced after 2008. For retrofitting into older WG 150 units, verify the spline count and housing bore dimensions against your existing assembly. Always pair this gear with a new O-ring and cap screws to ensure a leak-free seal.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Encloses and supports the gear train assembly |
| 4656301066 | HOUS.FRONT SECT | Front section housing for input shaft bearings |
| 4656201015 | SCREEN SHEET | Filters debris from transmission fluid flow |
| 4656301037 | TUBE | Oil delivery tube for lubrication circuits |
| 0634313514 | O-RING | Seals the input gear shaft bore |
| 0636100803 | CAP SCREW | M10 fastener for housing sections |
| 4656301064 | HOUSING REAR PART | Rear section housing for output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing doweling |
| 0636100801 | CAP SCREW | M8 fastener for cover plates |
| 0636100160 | CAP SCREW | M16 fastener for main housing |
Frequently Asked Questions
Q: Can the 4657.354.061 input gear be replaced without removing the entire transmission?
A: In most WG 171 applications, you can access the input gear by removing the front housing section and clutch assembly. However, for thorough inspection, we recommend dropping the transmission to avoid damaging the HOUSING REAR PART.
Q: What is the expected service life of this OEM input gear?
A: Under normal operating conditions with proper lubrication, the ZF 4657.354.061 typically lasts 8,000–12,000 hours. Aggressive shifting or contaminated fluid can reduce this lifespan significantly.
Q: Do I need to replace the O-ring and cap screws when installing this gear?
A: Yes. We strongly recommend installing a new O-RING and CAP SCREW set to prevent oil leaks and ensure proper torque retention.
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Phone: +86 158 2286 3467 |
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ZF 4657.354.061 INPUT GEAR – Gear RFQ Support
PartsZF helps B2B buyers source ZF 4657.354.061 INPUT GEAR with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This gear page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 4657.354.061 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4656073031
- Documentation reference available for RFQ review
- Illustration section: POWER TAKE OFF
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4657.354.061 |
|---|---|
| Normalized SKU | 4657354061 |
| Part name | INPUT GEAR |
| Product category | gear |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
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- ZF 4657.354.044 OUTPUT GEAR
- ZF 4644.306.326 GEAR SHIFT HOUSING
